Provided below are ELISA kits targeting chorionic somatomammotropin hormone like 1, a human protein encoded by CSHL1. This protein is 222 amino acids long, with a mass of 25.4 kDa, and is a member of the Somatotropin/prolactin family. 4 isoforms have been identified. This is reported to be a secreted protein. Other alias names for this protein include: chorionic somatomammotropin CS-5, growth hormone B4, growth hormone cluster, CS-5, CSL, GHB4, and hCS-L.